Dozy sod. Setting a trajectory that is parabolic due to gravity takes time and distance into account. The relative position between three objects and allowance for movement through time is pure three dimensional. Complicated yes, but can be demonstrated without moving outside of The Principia.

Einstein's special theory isn't in the frame. Relativity tells us time would be a variable with regard to velocity. Whilst a spaceship is fast, it would not need correction as the increase in mass (not within measurable bounds) would retard the velocity to correct the time dilation. But none of this is measurable beyond theoretical models. Other than beagles, such things don't get lost.....